- /* number of bytes to be flushed */
- num1=BIO_ctrl(s->wbio,BIO_CTRL_WPENDING,0,NULL);
- if (num1 > 0)
+
+ /* This code originally checked to see if
+ * any data was pending using BIO_CTRL_INFO
+ * and then flushed. This caused problems
+ * as documented in PR#1939. The proposed
+ * fix doesn't completely resolve this issue
+ * as buggy implementations of BIO_CTRL_PENDING
+ * still exist. So instead we just flush
+ * unconditionally.
+ */
+
+ s->rwstate=SSL_WRITING;
+ if (BIO_flush(s->wbio) <= 0)